Telephone system.



J. A. an s. H. GBLLER. TELEPHONE SYSTEM.

APPLIUATIOI FILED NOV. 4! 1907.

903,561 Patented Nov. '10, 1908.

2 SHEETS-SHEET 1.

J. A. & S. H. GBLLER. TELEPHONE SYSTEM.

APPLIGATION FILED H01. 4, 1907.

903,561 Patented Nov; 10; 1908.

, 2 sums-sun 2Q ST TE$ TELEPHONE SYSTEM.

construction, not liable to get out of order,

easy ofsinstalla-tion, requiring no disturbance of ;'the "ordinary line conditions and appli' ancegiand" whiehwillmot impede the voice currentsin'fthe line when a talking circuit is completed.

In the accompanying drawings, wherein we. have. illustrated an operative embodi menttf our invention Figures 1 and 2 are respectively front andt'rear elevations of the "signaling apparatus withparts broken away; 80

Fig. 3 is ant end elevation thereof; and, Fig. dis a diagrammatic iew indicating the wiringl di our signaling devices in circuit.

hrou hout' the several views like numer-. als oi re erence-refe'r always to like parts.

Ini-nithaz-cembodiment :of our invention we provide-in eneral contact parts fixed against rotatidn w ich are respectively portions of the ringin-gand receiver circuits, movablecontactsforicooperation with such stationary contacts only under predetermined conditions, 1 for selective -purposes, electro responaiveldevices for actuating the movable contacts, and electrically operated releasin means for restoring the contacts to normal or initial. position:

' llnltthe eeific embocliment shown 10 indicates in general a, frame, wherein is, mounted a shaft 11', bearin on what we may term the front side of t ejframe, a rotative contnctrcarrier, such as a wheel 14 preferably, of' insulatin'g 'material, and having suitably fixedfihereon three contacts, to-wit, a single contaet laior connection in the talking c117 minim, elongated ory nultiple contact 16.; of suitahlefiextent for the articnl arjins talla tide, a a te e na obflzia at. enemies,

, seesawetiesggfinere ;3,

ment edqcertaana.newzrand useful Improvea jmau meamvmbua,1907. semi Notlo'o t circuit, and a single- 17 insulated from but immediately following contact 16 with reference totheldireetion of rotation t ringing elrcuit. u J,

Associated with the frame, :for hearing on the wheel are three non-rot at e contaets,-one' of which, indicated at 18, ma r normal contact with the moving contact- 125, 'while a'second contact 19 standsat etermined distance from saidcontactil 8, t ceive contact of the Wheel, adapted for coni ection in the 1.5 whenthe parts. are inp sition assumed when the corresponding subscriber is called;

and the third contact 20 is arrangedfornon nially bearing n'poiii-the' elongated movable contact. 16. The arrangement such that at the contact '15 niovedl froniicoaction with contact 18 to coa'ction fwith"contact 19, the contact 16 passes frorn, beneath contact 20, and contact 17 comes into 1 ister and connection with said'contact The contacts 18, 19 and 20, may all be of iilar construction and arrangement, each being preferably yielding in character, to such end being mounted on a stem 21 sliding in aisleeve 22, suitably secured to the frame, and maintained by a spring 23 in yielding engagement with the periphery of the wheel 14. For convenience. of adjustment of the devicetto the use of the particular subscriber, sleeve 22 for contact 19is removably mounted on the frame in one of a series of apertures 24;, pro

vided for the purpose in arcuate arrange- -ment with respect to the axis of wheel 14.

Upon the shaft 11 is also mounted a ratchet wheel 25, preferably bearing astop 26, for engagement with a stud 27 to prevent backward rotation of the ratchet past a definite point, at which the contacts will occupy thezpositions shown in Fig. 1, and normal maintenance of the parts in such position is insured by the provision of a spring 28 at one end secured to the shaft 11 and at its other end secured to the frame, as indicated in dotted lines m Fig. 1.

The actuating mechanism for the wheel 25 v, consists ,of ,a n .e lectro magnet 30, controlling an elongated armature 31 pivoted as at 32 to the bottom' of the frame, and having a lower extension 33 to which is secured a'spring 34 adjustable by a tension nut -34'. for mantain in g;; said armature normally" out of contact ,vyithithe magnet pole. The upper end of the ,arniatur'e carries a pawl 35, whic'hfengages helt eeth of ratchet '25 with pawl being provided "wi a projection 'a-vity action, ii

ioo

. 36 extending into suitable proximity to the release magnet to be described.

A detent 37 is preferablyprovided for engagement' with the ratchet, such detent bein pivoted in the frame as at 38 and provide with. an arm 39 extending below the arm 36 into suitable association with the release malgn'et. c t

he release magnet 40, is preferably made in the form of a solenoid having a core 41, connected by a suitable spindle 42 withth'e arm 39 of detent 37, the spindle 42 extending upward through the center of. the coil into contact with the under surface of the arm 36, so that in normal condition When'the release magnet 40' is dee'nergized the weight of its core maintains detent 37 in engagement with the ratchet, while the depression of spindle 42 ermits the engagement of pawl 35 with is energized it'attract's its armature 131 drawing thepaw} into engagement with the first toot of the ratchet, and as the magnet becomes deenergized'the sprin' '34 returnsthe armature to 1nitial'posit1onf orcingthe ratchet 25 and correspondingly the contact wheel 14, ahea'd one step,- detent 37 engaging the ratchet to prevent return of the parts with the next attraction of the armature. Such advancementof the. ratchet 11, however, puts the spring. 28 under tension, tendin position.

magnet is energized, so that the mo ement of 1ts core 41 raises arms 39 turns to initial position-, where the j stop 26 engages the abutment .27 u nthe frame,

t will ap'p'arentto t ose skilled .inthe art that other electro-mechanical devices might be used to'impart the step by step movement to shaft 11, and to secure its return .when' released.

The device constructed as described is wired in circuit as shown in Fig, 4,; wherein and 51 indicate line wiresentering terminals 52 and-53 respectively, terminal 52 having connection by wire 54 through the operating magnet 30 to contact 20,- a secondconnection through wire 5 5,.withboth of the contacts 18 and 19 and a third connection,

by wire56'througliithe release ma et 40 to ground. The remaining termina 53 has ,wire connection 57 with; the switch a h of .a usual telephone set whose lower con tact has two connections, one through the bell b and-Win58 to the movable contact 17',

and the other through a short-circuitin" operating wire 59. direct to vthe elongate movable contact .16. Thejuppercontact of the transmitter has usual connection through c r the receiver r by wire 60 to'the movable contact 15-.

sai ratchet. In operation it will be appar- 'entthat' at each .tnnethe opera-ting magnet.

to return the parts tonormal onsequently when the releaseand '36, iift ing both the pawl 35 and ('letent'37 out, of en gageinent with the ratchet 25, the latter-re= listening in -is,

To restore the parts'to normal position the operator merely grounds line 50 through t 6 It will no w be understood, that, assuming the 'stationunder consideration to be-No.' 3

on the arty line, the contact parts are so arrange that when three impulses of direct current are sent through the operating magnet3Q, ,and the contact wheels are correspondrn'gly-advanced three steps, the contact -17 at station 3, will be brought beneath con tact 20, and contact 15 willmove forward to engagement with contact 19; Now it 'willbe understoodth'at', assuming the central station -to be equi ped with means .for transmitting either irect or alternating'current.

over line 50, and'with means for grounding lin'e 50 through a source of current supply,

that the apparatus-may be operated as fol- Y lows v Assuming that subscriber-number 13 is to be called, the central operator transmits three direct impulses over line. 50,.--which pass from line 50 through the circuit 54, 30,

' 20, 16, 59, a h, 57 to return wire 51, so that the operating magnet 30 is energized three times and the wheel 14 is-advanced to the positionberetofore described, in whichvcontacts 17-20 and contacts '15. 1-9 register; Now alternating current transmitted over line 50 takes the path 54, 30, 20,-17,58, bell 1), h, 57, 5 1, so rmging the subscribers bell. 'No other subscriber rec'eives'the ring for the.

reason that it requiresfei'ther more or less of three impulses to bring the contact wheelof any other subscriber to such position that the efiective contacts 15i'19 and -17-20' described are made. Nowwhen the subscriber vremoves hisrece'iver from the. .hook s h, the

talking circuit is established from wire 50 'by wire 55, contacts 19-1 5,"wire'60 through M the receiver to the fswitch'hook and-back to the line 51', While obviously all other receiver circuits of the arty lines are'broken'and erefore, impossible.

battery so causing the v ounde'd magnet '40 tobeco'me energized, anfbyattracting its armature, to'release the'parts and permlt an the signal wheelsautomatic restoration o t o hiormal position,

Whilef"' we;have herein described in some detail a "specific embodiment ofour inven- 'tion, whic -in the art that c anges might be made in the' specific structure withoutdeparwe believe to be new sand ad-v yantaeons, it'will be apparent to those skill --ture. "from 'thefs pirit and scope of our in- Y vention. a

Having thus" described our Patent, is

o 1,. Thecomb mat; with a telephone line, I .of a controlling mechani'sm'forthe signaling.

and circuits, com rising a. movable -.con'ta'ct can'ier, suita le contacts there.

s r r-c mp e g. *1 operating; signaling u invention, what w c i eniid to c e by e s- I termined' int. 10. it

and receiving. circuits, at redetermined points only, an rating circuit bridged across the line exc uding the signaling deand normally closed throughcontacts ..on said controllinglmechanism, and-electro 'responsivemeans'in said bridge for actuating said contact carrier to coii icidently close the receiver and ringing circuits at a prede- -2. A ac tive apparatus for connection with a telephone system comprising a rotatable contact carrier, three contacts thereon,

4 f9! connection with the talking circuit, the

ringing circuit and an operating circuit 1'e' 'vely, and three stationary contacts, two or cooperation with the talking circuit contact on the carrier, and one for coaction with both ,the operating circuitandringing circuit contacts of the carrier.

3. In a lock-out appliance for telephones, a

rotatable cont act carrier, a contact part thereon for connection with the receiver circuit,

, an elongated contact thereon for connection connected with the stationary contact, w ich normally coacts with the operating circuit immediate y "following rating circuit, a contact point said'elon ted conforconnection with the ringin circuit, stationary contacts normally coacting with the first two said movable contacts, and a second stationary contact for the a receiver with an o circuit contact, arranged for coact-ion therehands.

with when the ringing circuit movable contact is in association with the coacting stationai'y contact, and means for rotating said contact carrier comprising anelectro ma at contact.

4. In combination'witha telephone circuit, a controlling mechanism comprising'station- 'ary and movable contacts for the signaling, operating, and talkingcircuits, an electroresponsive actuating means for the controlling mechanism includedin an operatin circuit, a releasin means for the contrdlling mechanism, anda magnet therefor in a circuit-not controlled by said controlling mechanism.

5. A selective "apparatus for connection with a telephone system comprising a movable contact carrier, means for im arting a step by step movement thereto inc uding an contact, and a stationary contact or connection in the actuator circuit, the contacts for the actuator circuit being arranged to operatively close said actuator circuit through every ste of the carrier until the circuit of the telep ione set is closed by movement of such carrier. v

In testimony whereof we hereunto set our JOSEPH A. GELLER. STEPHENH. GELLER.

In the presence of-- v Gno. T. MAY, J r., MARY F. ALLEN. 

